JPH04238928A - Solid stretched chord arch dome reinforced with tension material, and construction thereof - Google Patents

Abstract

PURPOSE:To make material to be used, and assembling labor, as less as possible, and enable a constructing span to be enlarged in the case of wooden construction. CONSTITUTION:Between a compressive ring at an apex section and a lower section structural-body on the outer peripheral section in an arch dome, a plurality of arch members 1 are radially erected, and on the respective arch members, a plurality of clustered members 2 are suspended to be reversed-V-shaped. At the lower end sections of the clustered members, in the pole direction of the arch dome, a plurality of diagonal rods 4 are radially erected, and in the circumferential direction of the arch dome, a plurality of circular rings 3 are erected. On the execution of work, the compressive rings, arch members, and diagonal rods of the arch dome are assembled on ground, and the apex section is slowly pushed up and is developed to be of a specified arch dome type, and after that, the joint sections of the compressive rings 3 and the respective arch members 1, and the joint sections of the lower section structural-body and the respective arch members, are jointed to each other, and the circular rings are erected.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional stringed arch dome reinforced with tension material and a construction method thereof.

0002

[Prior Art] In general, three-dimensional arches and three-dimensional truss domes are extremely advantageous as structural methods for constructing large span structures such as gymnasiums, so they are applied to the construction of large buildings such as gymnasiums and stadiums. .

Conventionally, this type of arch structure or dome structure has been constructed by three-dimensionally assembling many single members made of steel pipes and the like.

0004

[Problem to be solved by the invention] However, conventional three-dimensional arches and three-dimensional truss domes require a large amount of single material.
Assembling it also required a lot of manpower.

[0005] Also, a large span can be achieved using only a radial arch.
When attempting to construct a building, it was necessary to make the cross section of the arch material considerably larger, which increased the weight and material cost of the entire structure, and was also inevitably constrained by architectural space. .

[0006] Furthermore, the overall structure, such as the structure of the joint, has become more complex, and as a result, stress analysis has also become more complex, and there are some cases that cannot be analyzed without the aid of a computer.

[0007]Furthermore, recently, wooden archedomes that make use of wood materials have also attracted attention and are being actively constructed.
There was a natural limit to the scale that could be built using only wooden structures.

[0008] This invention was proposed in order to solve the above-mentioned conventional problems, and it is possible to minimize the materials used and the labor required for assembling the same, and when constructing a wooden structure, the construction span can be reduced. The object of the present invention is to provide a three-dimensional stringed arch dome reinforced with a tension material that makes it possible to increase the size of the dome, and a construction method thereof.

[0009]

[Means for Solving the Problems] In order to achieve the above object, a three-dimensional stringed arch dome reinforced with a tension material according to the present invention has a compression ring on the top of the arch dome, and a compression ring on the top of the arch dome. A lower structure is provided on the outer periphery of the compression ring, a plurality of arch members are installed radially between the compression ring and the lower structure, and a plurality of bundle members are attached to each arch member. A plurality of diagonal rods are installed vertically in an inverted V shape that spreads on both sides, and the lower ends of adjacent bundles are joined, and a plurality of diagonal rods are installed radially in the pole direction of the arch dome. A plurality of circular rings are connected to both the upper and lower ends of each arch dome and the lower end of the bundle material, and a plurality of circular rings are installed in the circumferential direction of the arch dome, and the circular rings are connected to the lower end of the adjacent bundle materials. It is made by joining.

[0010] Also, the construction method involves assembling the arch dome's compression ring, arch material, and diagonal rod on the ground, and then gradually pushing up the top of the arch dome to a predetermined position. The arch is expanded into a dome shape, and then the joint between the compression ring and each arch member, the lower structure and each arch is expanded.
At the same time as joining the joint with the chi material, a circular ring is constructed.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below based on an illustrative embodiment.

FIG. 1 shows the whole of a three-dimensional stringed arch dome reinforced with a tension material according to the present invention, and FIGS. 2 to 7 show details of each part thereof. 2 is an arch member, 2 is a bundle member, 3 is a ring cable, 4 is a diagonal rod, 5 is a lower chord rod, 6 is a compression ring, 7 is a boundary ring, and number 8 is a lower structure.

The arch material 1 is constructed as an assembled material made by joining together two or more pieces of wood laminated wood each having a vertically long rectangular cross-sectional shape, and has sufficient bending rigidity around the weak axis. has been done.

The arch member 1 also includes a plurality of straight members 1a,
1a rigidly joined in the longitudinal direction, and is devised so that it can be assembled on-site.

Furthermore, the transmission of stress at the joint between the straight members 1a, 1a is achieved by directly transmitting compressive stress by so-called wood touch, and at the joint between each arch member 1 and the compression ring 6. Bending and tensile forces are transmitted by a connecting bolt 9, which will be described later.
Further, the shearing force is transmitted by the shearing force of the sandwiching plate 1b and the bolt 9 (see FIG. 5).

The arch member 1 thus constructed is temporarily installed radially between the compression ring 6 at the center of the dome and the lower structure 8 at the outer periphery of the dome, and its upper and lower ends are connected to the compression ring 6. and the lower structure 8 by a plurality of connecting bolts 9, 9 (see FIG. 5).

At least two upper and lower joint bolts 9, 9 are used at the joint between the upper end of the arch material 1 and the compression ring 6, and the joint is made to be able to rotate freely before final tightening. Yes (see Figure 5).

Furthermore, the lower end of the arch member 1 and the lower structure 8
The joint portion with the bolt is also allowed to rotate freely before final tightening (the details are approximately the same as those shown in FIG. 5).

The bundle members 2, 2 are vertically disposed in an inverted V-shape at each joint 1b of the straight members 1a and 1a of the arch member 1 so as to gradually spread to both sides of the arch member 1, Its lower end is joined to the lower end of the adjacent bundle members 2, 2 (second, fourth,
(See Figure 7).

For the bundle material 2, a section steel such as H section steel or a steel pipe such as a circular steel pipe or a square steel pipe is used.

The ring cable materials 3, 3 are temporarily installed in a circular ring shape along the inner periphery of the dome between the lower end joints 2a, 2a of the adjacent bundle materials 2, 2. 3 restrains the arch members 1, 1 from expanding outward (see Figures 2, 4, and 7).

Although wire is mainly used for the ring cable 3, it goes without saying that a PC steel rod may also be used.

The diagonal rods 4, 4 are the arch material 1
Between the joint 2a between the upper end and the lower end of the bundle material 2, between the joint 2a between the lower end of the arch material 1 and the lower end of the bundle material 2, and between the joints 2a, 2a at the lower end of the bundle material 2, the entire arch The bridge material 1 is constructed so as to form an elongated polygonal shape in the longitudinal direction (the second
, 4, 7).

The lower string rods 5, 5 are connected between each joint 1b of the arch material 1 and each joint 2a of the lower end of the bundle material 2, between the joint 2a of the lower end of the arch material 1 and the lower end of the bundle material 2, and between the joints 2a of the lower end of the arch material 1 and the lower end of the bundle material 2, and - Temporarily installed diagonally between the joint portion 2a of the upper end of the bundle material 1 and the lower end of the bundle material 2.

Therefore, the diagonal rod 4 and the lower string rod 5, together with the arch member 1 and the bundle member 2, constitute a mechanically extremely advantageous three-dimensional string truss. It also has a function.

Although PC steel rods are mainly used for the diagonal rod 4 and the lower string rod 5, it goes without saying that wires may also be used.

The compression ring 6 has a plurality of connecting members 6c between an inner ring 6a and an outer ring 6b which are configured in a circular ring shape.
It is assembled by erecting diagonal members 6d radially (see Figures 5 and 6).

Note that steel materials such as square steel pipes are used for the inner ring 6a, outer ring 6b, connecting member 6c, and diagonal member 6d.

The boundary ring 7 is installed in a circular ring shape along the outer periphery of the dome between the lower ends of the arch members 1, 1. The lower ends of the two are constrained to each other so that they do not spread outward (see Figures 2, 4, and 7).

The lower structure 8 is mainly made of reinforced concrete or steel-framed reinforced concrete, and the lower structure 8 supports each of the arch members and, ultimately, the entire dome.

In such a configuration, the arch material 1, the bundle material 2, and the compression ring 6 act as compression materials against external forces, and the ring cable 3, the diagonal rod 4, the lower chord rod 5, and the boundary ring 7 The bundle members 2, 2 serve as tension members, and the bundle members 2, 2 serve to connect the arch member 1 and the ring cable 3 to prevent the arch member 1 from spreading outward, and also act together with the diagonal rod 4. Working arch material 1
It also plays a major role as an anti-buckling material.

Each arm of the dome roof assembly constructed in this manner
A membrane material (not shown) such as Teflon glass fiber cloth is stretched between the steel members 1 and 1.

The membrane material is fixed between the arch members 1, 1 by a membrane holding cable (not shown) running along the central trough line.

Next, the construction method of the arch dome according to the present invention will be explained step by step (see FIGS. 8 to 18).
.

(2) After or before constructing the lower structure 8, temporarily install a guide rail 10 on the outside of the lower structure 8 (see FIG. 8). The guide rails 10 are temporarily installed radially on the extension line of each arch member 1 to be constructed. Also,
A pedestal 11 is installed in the center.

■ Next, on the ground, each arch material 1
, 1 and the compression ring 6 are respectively assembled, and each arch member 1, 1 is joined to the compression ring 6 with a joining bolt 9 (see FIGS. 9 and 10).

The arch member 1 is assembled lying between the tip of the guide rail 10 and the pedestal 11, and the compression ring 6 is assembled on the pedestal 11.

[0038] The joining pin 9 connects the arch material 1 and the compression ring 6.
Attach only one so that the joint with the
This is a temporary connection.

A guide rail is provided at the outer end of each arch member 1.
A roller or a shoe that can slide on the roller 10 is attached.

[0040] Also, each arch member 1 is connected to tie rods 12, 1.
2 to prevent deformation (see Figures 17 and 18).

[0041]Next, by gradually raising the center frame 11, the compression ring 6 is pushed straight upward, and the arch material is expanded into a predetermined arch dome shape (11th
, 12, 13).

The height of the pedestal 11 is increased by sequentially adding support columns 12, 12. When the compression ring 6 is pushed upward by this method, the arch members 1,1 are gradually erected, and the outer ends of each arch member 1,1 are aligned with the guide rails 10,10. Slide the top of the dome towards the center of the dome.

■ After pushing up the compression ring 6 to a predetermined height, attach the remaining connecting pins 9, 9 to prevent rotation of the joints between the compression ring 6 and each arch member 1, 1 to make them completely rigid. Join (see Figures 14, 5, and 6).

Furthermore, the lower ends of each of the arch members 1, 1 are placed on the lower structure 8 and are completely and rigidly joined to the lower structure 8. Further, the lower ends of the bundle materials 2, 2 adjacent to each other of the arch materials 1, 1 are joined.

[0045] Next, ring cables 3, 3 are installed between the joint parts 2a, 2a at the lower ends of the bundle members 2, 2, and a boundary ring 4 is installed at the lower end of each arch member 1, 1. (See No. 15, Figure).

[0046] Next, the guide rail 10 and the frame 1
1 and tie rod 12 (see Figure 16).
.

When the pedestal 11 and tie rod 12 are removed, the ring cables 3,
3 and the diagonal rods 4,4, resulting in a structural stiffening of the entire roof frame.

[0048] The arch dome can be constructed by the above assembly method, and once the roof frame assembly is completed, the roof is covered with a membrane material.

[0049]

[Effects of the Invention] Since the present invention has the above configuration, it has the following effects.

[0050] ■ All members other than the arch materials are wires such as spiral cables and string materials with small cross sections such as PC steel bars, so the building space may be narrowed by the structural materials. There are no restrictions and it is possible to secure as much architectural space as possible.

[0051] Also, unlike the conventional method, many single materials such as steel pipes are not required, which simplifies structural calculations and reduces material costs, and also simplifies assembly work, greatly reducing work effort. .

■ Since the upper ends of each arch member are not directly joined to each other but are individually joined to the compression ring, the joining of the upper end parts of the arch members can be made into an extremely simple structure. I can do it.

[0053] When using a wooden arch, the surface of the wooden material can be shown to the maximum extent, so it is possible to construct a wooden arch dome that makes the most of the wooden material. It is also possible to easily extend the span of the wooden structure.

[0054] Since the connecting material for connecting these members between adjacent arch members is omitted, it is easy to apply a finishing material such as a membrane material on top of the arch members.

[0055] At the same time as the frame at the center of the dome is removed, tensile force is introduced into the ring cable and diagonal rod due to the weight of the arch material, and the entire roof assembly is strengthened structurally. Therefore, there is no need to intentionally introduce tension into these members.

■ Since all the main structural materials such as arch materials can be assembled on the ground, not only is there no need for lifting equipment such as cranes to lift the structural materials high above the ground, but there is also no need to use lifting equipment such as cranes to lift the structural materials high above the ground. The work at the site is greatly reduced, work safety is improved, and construction accuracy is improved.

■ The arch material is supported at two points, the outer edge and the center end, and is gradually moved to the center of the dome, so it is difficult to manage the position of the arch material during construction. Easy to adjust.

[0058]

[Brief explanation of the drawing]

FIG. 1 is a plan view of the entire archdome.

FIG. 2 is a partial plan view of the arch dome.

FIG. 3 is a partial side view of the archdome.

FIG. 4 is a partial vertical sectional view of the archdome.

FIG. 5 is a partial plan view of the compression ring.

FIG. 6 is a partial side view of the compression ring.

FIG. 7 is a partial perspective view of the arch dome.

FIG. 8 is a step diagram showing a method for assembling an archdome.

FIG. 9 is a step diagram showing a method for assembling an archdome.

FIG. 10 is a step diagram showing a method for assembling an archdome.

FIG. 11 is a step diagram showing a method for assembling an archdome.

FIG. 12 is a step diagram showing a method for assembling an archdome.

FIG. 13 is a step diagram showing a method for assembling an archdome.

FIG. 14 is a step diagram showing a method for assembling an archdome.

FIG. 15 is a step diagram showing a method for assembling an archdome.

FIG. 16 is a step diagram showing a method for assembling an archdome.

FIG. 17 is a partial plan view of the arch dome during assembly.

FIG. 18 is a partial side view of the archdome during assembly.

[Explanation of symbols] 1...arch material, 2...bundle material, 3...ring cable, 4...diagonal rod, 5...lower string rod, 6...compression ring,
7... Boundary ring, 8... Lower structure, 9... Joining pin, 11
...Mountain frame, 12...Tie rod.

Claims (2)

[Claims] Claim 1: A compression ring is provided at the top of the arch dome, a lower structure is provided at the outer periphery of the arch dome, and a plurality of arch members are arranged radially between the compression ring and the lower structure. A plurality of bundles are suspended from each arch member in an inverted V-shape that spreads on both sides of the arch member, and the lower ends of the adjacent bundle members are joined to form an arch. - A plurality of diagonal rods are installed radially in the pole direction of the arch dome, and the diagonal rods are joined to both the upper and lower ends of each arch member and the lower end of the bundle member, and in the circumferential direction of the arch dome. What is claimed is: 1. A three-dimensional stringed arch dome reinforced with a tension material, characterized in that a plurality of circular rings are erected on the bridge and the circular rings are joined to the lower ends of adjacent bundle members. 2. The compression ring, arch material, and diagonal rod of the arch dome according to claim 1 are assembled on the ground, and then the top of the arch dome is gradually pushed up. Then, the joints between the compression ring and each arch material and the joints between the lower structure and each arch material are joined, and the circular ring is expanded into a predetermined arch dome shape. A method of constructing a three-dimensional stringed arch dome reinforced with tension material.